Maybe in this fanfiction, Orochimaru somehow gets hold of the Venom symbiote and tries to use it to create a powerful weapon. But the symbiote escapes and attaches itself to Naruto. Naruto then has to deal with the fact that the other villagers are scared of him because of his new, monstrous appearance. However, he shows them that he's still the same Naruto by using the symbiote's powers for good and saving a group of villagers from a group of rogue ninjas.
In this fanfiction, Naruto as Venom could be on a mission in the Marvel universe that accidentally crosses paths with Black Widow. The symbiote gives Naruto enhanced strength and agility, which Black Widow quickly notices. At first, she thinks he's a threat. But Naruto, being Naruto, tries to explain his situation. They then discover that there's a link between the chakra in Naruto's world and the strange energy sources in the Marvel universe. So, they join forces to investigate this link further, which leads them to various adventures and battles against powerful foes.
Perhaps the mask is a family heirloom of one of his friends, and Naruto is entrusted with it. He soon realizes that the mask has a mind of its own and tries to communicate with him. Naruto has to figure out the mask's purpose and how it can be used to help the village. He might face challenges from those who think the mask is a curse and should be destroyed.
Well, one possibility could be that Naruto discovers the Wabisuke in an ancient ruin during a mission. Maybe it has some kind of special power that only he can unlock because of his unique chakra. He then has to figure out how to use it without it consuming him, as it might be a very powerful and dangerous weapon.
The plot might be that an enemy steals Samehada and Naruto has to get it back. Along the way, he discovers that Samehada has a connection to an ancient and powerful clan. Naruto teams up with some members of this clan who want to reclaim Samehada as well. They face many challenges together, and Naruto uses his own skills and the power of Samehada to defeat the enemy. In the end, Naruto decides what to do with Samehada, whether to keep it or return it to the clan, depending on the bond he has formed with it.
One possible plot could be that Naruto somehow ends up in the Soul Society. There, he discovers Hyourinmaru. Maybe through some strange magic or accident, he forms a bond with it. He then has to learn to control Hyourinmaru's powers, which are very different from his chakra - based powers. He might face challenges from the Soul Reapers who initially don't trust him with such a powerful zanpakuto.
One possible plot could be that Naruto is on a difficult mission and Yamato is assigned to be his partner. They start off with some misunderstandings due to their different personalities. Yamato is more reserved while Naruto is brash. But as the mission progresses, Naruto starts to learn from Yamato's calm and calculated approach and Yamato begins to see Naruto's determination and heart. In the end, they form a strong bond and become great friends who can rely on each other in future battles.
The plot might involve Naruto being summoned to Godzilla's realm by a powerful sorcerer who wants to use Naruto's skills. Naruto is initially shocked by Godzilla's size and power. However, he quickly adapts and decides to help Godzilla. He uses his Rasengan to attack smaller threats to Godzilla while Godzilla focuses on the bigger threats. In the end, Naruto returns to his world with new knowledge and a newfound respect for the power of kaiju.
One possible plot could be that Naruto discovers a strange power that somehow gives him the Senbonzakura ability. He then has to learn how to control it while still using his own ninja skills. Maybe he uses it to fight a new, powerful enemy that his normal jutsu can't defeat.
It could be about Naruto somehow ending up in the Venom universe and having to team up with Venom to fight a common enemy.
Perhaps the plot could start with Orochimaru experimenting with some strange new chakra that is actually the Venom symbiote. Naruto gets infected during a battle with Orochimaru's minions. With the Venom symbiote, Naruto has enhanced strength, speed, and a new form of stealth. But the symbiote also has a mind of its own and tries to make Naruto more aggressive. Naruto has to fight against this internal struggle while also facing external threats from enemies who want to use the symbiote for their own evil purposes.